"Glowing Smile" seen in Bobbie Mason's garden in Red Oak on Thursday, April 18, 2013. Mason's garden is one of the tour stops for the America Iris Society's national convention in Dallas.(Cooper ...

In many albino animals, the “whites” and irises of their eyes are actually a striking red. ... It’s a common misconception that albino animals’ eyes have red pigment.

The amount of melanin in your iris determines your eye color. “It’s all about the internal reflection of light proportional to the amount of melanin,” says Patel.

•The red eye is caused by the colour of the iris, which controls the diameter of the pupil. Only some diving birds have red irises.

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Uveitis, a type of inflammation that causes red eyes, pain, ... This procedure changes your eye color by destroying the pigment, or color, cells in your iris. When they go away, brown eyes look blue.